No-clearance rectilinear motion actuator with multiple-stage planetary roller screw pair

A technology of linear motion and planetary rollers, applied in transmission devices, belts/chains/gears, mechanical equipment, etc., can solve problems such as reducing motion stability and running accuracy, reducing motion efficiency, increasing mechanism wear, etc., to achieve structural Compact, reduce processing difficulty, ensure the effect of operation

Pending Publication Date: 2019-03-29
NANJING TECHN EQUIP MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the use of sliding fit, the friction force is large during movement, which increases the wear and tear of the mechanism and reduces the movement efficiency; at the same time, the sliding fit has a gap, which will reduce the smoothness of movement and running accuracy during movement; therefore, it is necessary to improve the existing technology To solve the deficiencies of existing technology

Method used

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  • No-clearance rectilinear motion actuator with multiple-stage planetary roller screw pair
  • No-clearance rectilinear motion actuator with multiple-stage planetary roller screw pair
  • No-clearance rectilinear motion actuator with multiple-stage planetary roller screw pair

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Effect test

Embodiment Construction

[0016] The present invention will be further described below in conjunction with the accompanying drawings.

[0017] like Figure 1 to Figure 5 As shown, a multi-stage planetary roller screw pair gapless linear motion actuator of the present invention includes a primary screw 2, an actuator housing 3, a first roller nut 4, a sliding sleeve 5, and a first deep groove Ball bearing 6, first-stage housing 9, second-stage housing 12, sleeve 16, push rod 17, hollow screw 18, second roller nut 19, rolling spline sleeve 20, gland 21 and limit Sleeve 23, the first roller nut 4 is threaded on the primary screw 2, the sliding sleeve 5 is sleeved on the outer wall of the first-stage housing 9, and the outer wall of the sliding sleeve 5 is slidably connected to the inner wall of the actuator housing 3 superior. The left end of the hollow screw 18 is rotatably supported on the inner wall of the first-stage housing 9 through the first deep groove ball bearing 6, the gland 21 and the limit ...

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Abstract

The invention discloses a no-clearance rectilinear motion actuator with a multiple-stage planetary roller screw pair. A first roller nut is in threaded connection with a first-stage screw, a sliding sleeve sleeves the outer wall of a first-stage shell, the outer wall of the sliding sleeve is connected to the inner wall of an actuator shell, and the left end of a hollow screw is rotationally supported on the inner wall of the first-stage shell through a first deep groove ball bearing. A pressure cover and a limiting sleeve sleeve the first roller nut, and the limiting sleeve is fixedly connected with the first roller nut; a rolling spline housing is fixedly connected in the hollow screw, the rolling spline housing is in threaded connection with the first-stage screw, a second roller nut isin threaded connection with the hollow screw, the second roller nut is fixedly connected with a second-stage shell, and the second-stage shell is slidably connected to the inner wall of the first-stage shell through the sliding sleeve. The no-clearance rectilinear motion actuator is stable in transmission, high in transmission precision and good in using effect.

Description

Technical field: [0001] The invention relates to a multistage planetary roller screw pair gapless linear motion actuator. Background technique: [0002] At present, in order to achieve a larger original length-stroke ratio for linear motion actuators, a multi-stage operating actuator that can achieve two-stage stroke output has been developed. It mainly adopts the design of series mechanism. There is a through hole in the center of the second-stage motion shaft, which can pass through the motion of the first-stage motion shaft to realize the second-stage stroke output; the inner spline is processed in the through hole of the second-stage motion shaft, which is consistent with the first stage. The external spline fit at the end of the stage motion shaft realizes motion guidance and sliding fit. However, due to the use of sliding fit, the friction force is large during movement, which increases the wear and tear of the mechanism and reduces the movement efficiency; at the sam...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H25/22F16H25/24
CPCF16H25/2252F16H25/2261F16H25/24F16H2025/2271F16H2025/228
Inventor 黄育全赵江杰张勤张柏林王东跃
Owner NANJING TECHN EQUIP MFG
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